#!/usr/bin/env python

# Import the llvm-py modules.
from llvm import *
from llvm.core import *
from llvm.ee import *          # new import: ee = Execution Engine

# Create a module, as in the previous example.
my_module = Module.new('my_module')
ty_int = Type.int()   # by default 32 bits
ty_func = Type.function(ty_int, [ty_int, ty_int])
f_sum = my_module.add_function(ty_func, "sum")
f_sum.args[0].name = "a"
f_sum.args[1].name = "b"
bb = f_sum.append_basic_block("entry")
builder = Builder.new(bb)
tmp = builder.add(f_sum.args[0], f_sum.args[1], "tmp")
builder.ret(tmp)

# Create a module provider object first. Modules can come from
# in-memory IRs like what we created now, or from bitcode (.bc)
# files. The module provider abstracts this detail.
mp = ModuleProvider.new(my_module)

# Create an execution engine object. This will create a JIT compiler
# on platforms that support it, or an interpreter otherwise.
ee = ExecutionEngine.new(mp)

# The arguments needs to be passed as "GenericValue" objects.
arg1 = GenericValue.int(ty_int, 100)
arg2 = GenericValue.int(ty_int, 42)

# Now let's compile and run!
retval = ee.run_function(f_sum, [arg1, arg2])

# The return value is also GenericValue. Let's print it.
print "returned", retval.as_int()